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Invasives Strike Force EcoQuest Survey

Welcome to Lower Hudson PRISM's Invasives Strike Force EcoQuest Survey page!!!

Do you love being outdoors and searching for interesting critters and plants in nature? Or maybe you love taking photos when you are out hiking or gardening? Or maybe you just love scavenger hunts! Our EcoQuest surveys allow you to become a part of the action and help us document invasive species in our region while having fun in the process! To become an EcoQuest surveyor, all you need to do is download an easy- to-use mobile app, iNaturalist, and register here for further instructions. Once iNaturalist is downloaded, you can immediately start photographing and uploading pictures, instantly connecting you to thousands of other citizen scientists just like you!

To help you build up your knowledge of invasive species in our region, we offer a monthly challenge which keys in on a focal invasive species. Each month, Lower Hudson PRISM staff will announce a new scavenger hunt-style challenge to find and document an invasive plant or animal (and their native counterpart!) by taking and sharing photos via iNaturalist. See below for this May's Wisteria Hysteria! challenge, instructions and other past challenges. While you do not have to join our specific project to participate in the challenge, we HIGHLY encourage you to do so. Search for us, Invasives Strike Force EcoQuest , on iNaturalist and join today to upload your photos directly to our project! Become an official member of our team today!

 Wisteria Hysteria! : May 2019

May’s EcoQuest Challenge focuses on three species of wisteria that you may find in both cultivated and wild/naturalized forms in New York and New Jersey: the invasive Chinese Wisteria (Wisteria sinensis) and Japanese Wisteria (Wisteria floribunda) species and American Wisteria (Wisteria frutescens). Although American Wisteria is native to North America, it is generally not considered native to New York State and New Jersey.

All three species of wisteria are in the legume family and are hardy, fast-growing woody vines that twine around most any structural support, including our native trees!  See the below graphics from as well as visit our Wisteria Species Spotlight page for more information on what to look for and how to tell them apart!


Difference in twining patterns between Japanese and Chinese species

If you see any flowers or vines that you think resemble any of the three species, please be sure to snap a photo and upload to iNaturalist! Although photos of wild populations are more data useful, it is ok to upload photos on other properties to help with phenology and the "look" of the vines in our region at different times of year. For more photos of these target species, simply search for them on iNaturalist and tons will pop up that you can view!

 I want in! How do I get started?

1. Download the iNaturalist App by visiting your phone's app store, or register to use it on

2. Visit iNaturalist's Video Tutorial page which has very clear step by step instructions on how to photograph your target species and upload to the iNaturalist database

 3. Sign-up at so you receive notice of each month's species.

3. Take photos of this month's EcoQuest challenge target specie(s) by using the iNaturalist app directly (note: this is the easiest way to take and upload photos since your location can automatically be part of your observation)


Take photos of the target specie(s) on your smart phone, then later upload them to the iNaturalist site on your computer. 

4. You can either add photos directly to our iNaturalist project Invasives Strike Force EcoQuest or simply upload your photos to the overall iNaturalist database. Our curators will then sort through the posts and add any invasives you found to our project!

5. Keep searching! Your photos will be used to help scientists track the spread of invasives in our region. It's important stuff!

This is fun! How do I stay informed of each month's challenge?

It's simple! Once you've downloaded iNaturalist and signed up for the project, you will receive notifications from iNaturalist about the next month's challenge as the date approaches! If you have any questions or problems, just shoot an email to LH-PRISM's Invasive Species Citizen Science Coordinator, Brent Boscarino, at and he will be happy to help!

Please also visit the NYBG EcoFlora page to learn more about their history of EcoQuest challenges in New York City.

 Former Challenges

Hello Yellow! : April 2019

April's EcoQuest challenge focuses on two "yellow sunburst" bloomers that are often mistaken for one another: the invasive lesser celandine, Ficaria verna (also called the fig buttercup) and the native marsh marigold, Caltha palustris. Both have kidney-shaped leaves, occur in moist soils and are low-growing with bright yellow flowers that typically begin blooming in April. See below for more information on what to look for and how to tell them apart! Happy hunting!



Photo courtesy of Linda Rohleder, LH-PRISM

At first glance, lesser celandine is a delight to our winter-weary eyes with its bright yellow, sunray-style petals (usually 8-12 per flower). However, its early emergence and rapid growth lead to dense mats being formed that crowd out and outcompete natives such as yellow trout lily and spring beauty! You may notice the dense leaf mats before the yellow flower blooms (for scale, the leaves are around the size of your thumbprint this time of year). Let's search for this pesky invasive together!


Photo courtesy of (Alex Katovich)

Marsh marigold typically blooms about a month behind lesser celandine. Marsh marigold also typically grows in clumps, not in dense mats,and have fewer and wider petal-like sepals than lesser celandine (marsh marigold has usually 5-6 broader petal-like sepals). The best way to tell if the plant is definitively lesser celandine and NOT marsh marigold without disturbing the soil is to look to see if it has GREEN sepals underneath the petals. If so, then it's lesser celandine! 

If you see any flowers that resemble EITHER lesser celandine or marsh marigold, please be sure to snap a photo and upload to iNaturalist! For more photos of these target species, simply search for them on iNaturalist and tons will pop up that you can view!


Odorous Arums : March 2019

This month's challenge focuses on two "odorous arums" found within the Lower Hudson PRISM region. 



Native skunk cabbage is one of the first signs of spring. This time of year, the spathe of these plants begin popping up in riparian/moist habitats if you look closely enough- they even do so through snow cover by raising their internal temperature and melting snow around them! Help us photograph and track the growth and changes of this welcome native arum, skunk cabbage, throughout March!


Italian arum is an invasive plant that is threatening woodland and riparian habitats in our PRISM region. This invader notoriously crowds out native species and is inedible due to its dangerous acute toxicity. Although Italian arum does not smell this time of year, when flowering they release an unpleasant odor to attract insect pollinators. Help us document the distribution of this invasive arum so we can limit its spread!


Take photographs of these two arums anywhere within our PRISM region and post your findings to our iNaturalist project, Lower Hudson PRISM: Odorous Arums so they can be added to our Lower Hudson PRISM project by our curators.


Photo credits: Invasive Italian arum photo credit: H. Zell, Wiki Commons; Native skunk cabbage photo credit: Ken Thoman, iNaturalist photo: